Fog Unit?? I think you have H3 globes in the fog lights, not HID. Change the H3 globes. Stick to 55w. Use +x% output if you want to. If you do have HID (not to be confused with xenon globes) then I belive they will be aftermarket by a PO..
Good - Fast - Cheap: Pick any two.
E23 735i; E32 735iL; E34 535i; 2 X E38 735iL (Oxford Green and Alpine White); R50 Cooper; R55 Cooper Clubman.
E38 Parts Car
E21 318i; E30 318i; E32 735iL; E34 535i; E38 730iL; E53 4.4i
I've just changed my wiper blades and now my reverse lights don't work. Should I change my fuel pump relay?